Returning to said conversation: I wasn't blaming exclusively the leadership of the Remain campaign for losing the vote, in 2016 or (even more significantly) 2019. But they do have a lot to answer for in the way they conducted it, and the way that the aftermath was handled.
As to some of the rest of birdie's points:
//(and I am assuming you're a UK resident here – forgive me if that is not the case)... //
I am.
// Why do you think it's a good idea to have our laws be subservient to EU law? EU law takes primacy over UK law. The EU can, and have, overridden UK law. The EU Parliament is a Parliament in name only. It cannot amend, repeal or make laws. That is done by the EU Commission. Not the Parliament. //
The first part can be answered by saying that it was "our" choice to enter into that arrangement, either explicitly in 1975 -- yes, I know that questions of sovereignty may not have been properly articulated then, and that the sort of research that may have answered those questions was harder in the 1970s, but still, it has always been a stated aim of the EC/EU to move towards political integration -- or implicitly, by continuing to lend our support in elections to governments who were happy with said arrangements. Even when Thatcher delivered her "No. No. No!" to aspects of what would become Maastricht, there wasn't any question of leaving -- and then when Major delivered on that he received quite the endorsement in the subsequent election.
My point then is that the supremacy of EU law over UK law was something that we had consented to. In those circumstances the person in ultimate control was still the UK, because the supremacy lasts only as long and extends only as far as it so chooses. That was the purpose of the now-repealed 1972 European Communities Act, for example.
I suppose a secondary response is more of a philosophical one: national sovereignty, in some areas at least, makes increasingly less sense in an increasingly integrated world. On those grounds alone I regret the re-assertion of national over supranational sovereignty.
// The EU Parliament is a Parliament in name only. It cannot amend, repeal or make laws. That is done by the EU Commission. Not the Parliament. If you don't like a particular member of the EU Commission, can you remove them from office in a vote? No you cannot. //
Here to some extent I agree with you, although I don't think it's so bad as you're painting it. The EU Commission is still accountable to Parliament and to the EU Council, although individual members are only accountable to the President of the Commission. This can (and should) be reformed, but then again the reforms that would be needed would serve either to increase the potential clash between national/supranational institutions, or make the EU essentially irrelevant. But the EU in its present form is only 28 years old (11 if you count starting from the Treaty of Lisbon), and is full of contradictions.
I've waffled. I suppose in short my point is that the EU has its flaws but those flaws can over time be addressed, and better to do so from within than without.